PT-2026-44346 · Linux · Linux Kernel

Published 2026-05-28 · Updated 2026-06-11 · CVE-2026-46223

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.0.11-1.1

Description A deadlock occurs in the cgroup subsystem during the rmdir(2) operation. The issue arises when the process calling rmdir is also the reaper of a zombie process that pins a PID namespace teardown. In this scenario, rmdir blocks in TASK UNINTERRUPTIBLE state while waiting for PIDs to be freed; however, those PIDs cannot be freed because the reaper (such as systemd) is stuck in the rmdir call, resulting in a system-wide deadlock. This is caused by the cgroup drain dying() function waiting for tasks to leave the cgroup synchronously.

Recommendations Update to version 7.0.11-1.1 or newer.

Exploit

Fix

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-46223

OPENSUSE-SU-2026:10954-1

Affected Products

Linux Kernel

References · 288

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46223.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-46223 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://git.kernel.org/stable/c/93618edf753838a727dbff63c7c291dee22d656b · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-46223 · Vendor Advisory
• https://git.kernel.org/stable/c/33fa2e6b1507a0a377a151a8826438bedad1d0b0 · Patch
• https://cve.org/CVERecord?id=CVE-2026-46223 · Security Note
• https://ubuntu.com/security/CVE-2026-46223 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-46223 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-46223 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-46223 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-46166 · Note
• https://suse.com/security/cve/CVE-2026-45996 · Note
• https://suse.com/security/cve/CVE-2026-46005 · Note
• https://suse.com/security/cve/CVE-2026-46128 · Note